import java.util.Scanner;
public class java7 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你的成绩：");
        int num1 = scanner.nextInt();
        if(num1>=90)
            System.out.println("优");
        else
            System.out.println("良");

    }
}
